Malaysian Journal of Analytical Sciences Vol 21 No 2 (2017): 445 - 451

DOI: https://doi.org/10.17576/mjas-2017-2102-20

 

 

 

RADIOTRACER APPLICATION IN MALAYSIA: RESIDENCE TIME DISTRIBUTION STUDY

 

(Aplikasi Teknologi Penyurih di Malaysia: Kajian Taburan Masa Mastautin)

 

Noraishah Othman*, Nor Pa’iza Mohamed Hassan, Roslan Yahya, Mior Ahmad Khusaini Adnan,

Mohd Rabaie Shari, Hearie Hassan, Airwan Affendy Mahmood

 

Plant Assessment Technology, Industrial Technology Division

Malaysian Nuclear Agency, 43000 Bangi, Selangor, Malaysia

 

*Corresponding author: noraishah@nm.gov.my

 

 

Received: 21 October 2015; Accepted: 14 June 2016

 

 

Abstract

The residence time distribution (RTD) study at power generation plant was successfully carried out using radiotracer technology. In this study, Tc^99m was used as the source of radioactive whereas NaI(Tl) detector was the scintillant detector. Previous study only concentrated on getting the flow rate from two successive peaks without producing any mathematical model. Thus, the hydrodynamics behaviour of the liquid inside the plant was weakly described. In this study, axial dispersed plug flow model is the best RTD model due to minimal value of sum of square which is 0.261 x 10^-5 compare to other RTD models recommended by International Atomic Energy Agency (IAEA).

 

Keywords:  residence time distribution, radiotracer technology, RTD models, sum of square

 

Abstrak

Kajian taburan masa mastautin (RTD) telah berjaya dilakukan di loji janakuasa elektrik menggunakan teknologi penyurih. Untuk kajian ini, Tc^99m telah digunakan sebagai penyurih radioaktif manakala pengesan NaI digunakan sebagai pengesan sintilasi. Kajian terdahulu hanya memberi maklumat berkaitan pengukuran kadar alir yang terhasil daripada dua puncak turutan yang terhasil tanpa membuat laporan berkaitan permodelan RTD. Oleh itu, kelakuan hidrodinamik bendalir di dalam loji tidak dapat dijelaskan dengan  baik. Untuk kajian ini, model aliran palam taburan aksial merupakan model terbaik RTD berbanding model yang dicadangkan oleh IAEA kerana nilai jumlah kuasa dua terhasil yang rendah iaitu 0.261 x 10^-5.

 

Kata kunci:  taburan masa mastautin, teknologi penyurih, permodelan RTD, jumlah kuasa dua

 

References

1.       IAEA (2008). Residence time distribution method for industrial and environmental applications. Training course series 931, Vienna, Austria.

2.       IAEA-TECDOC-1262 (2001). Radiotracer technology as applied to industry.Vienna, Austria.

3.       Arratia, P. E., Lacombe, J. P., Shinbrot, T. and Muzzio, F. J. (2004). Segregated regions in continuous laminar stirred tank reactors. Chemical Engineering Science, 59:1481 – 1490.

4.       Kasban, H., Zahran, O., Arafa, H., El-Kordy, M., Elaraby, S. M. S. and Abd El-Samie, F. E. (2010). Laboratory experiments and modeling for industrial radiotracer applications. Applied Radiation and Isotopes, 68: 1049 – 1056.

5.       Danckwerts, P. V. (1953). Continuous flow systems and distribution of residence times. Chemical Engineering and Science, 2: 1 – 13.

6.       Sugiharto, S., Suud, Z., Kurniadi, R., Wibisono, W. and Abidin,  Z. (2009). Radiotracer method for residence time distribution study in multiphase flow system. Applied Radiation and Isotopes, 67: 1445 –1448.

7.       Behin, J. and Aghajari, M. (2008). Influence of water level on oil–water separation by residence time distribution curves investigations. Separation and Purifification Technology, 64: 48 – 55.

8.       Pant, H. J., Sharma, V. K., Nair, A. G. C., Tomar, B. S., Nathaniel, T. N., Reddy, A. V. R. and Singh, G.(2009). Application of 140-La and 24Na as intrinsic radiotracers for investigating catalyst dynamics in FCCUs. Applied Radiation and Isotopes, 67: 1591 – 1599.